large, fast-moving snake that is typically greyish, dark brown to black above with a broad orange-red dorso-vertebral stripe that extends along most of the back. The belly can be white to orange in colour. The tip of the nose and the sides of the lips are usually creamish. There is local and regional variation in colouration and even specimens from the same location may differ considerably in colour. Head long and distinct from powerfully muscled but slender neck and forebody. Papuan taipans have large distinctive heads that are crudely rectangular; the body is large, long and muscular; the tail is round and tapers to a fine tip. The mouth is large and the lower jaw articulates well back beyond the labial scales giving these snakes an enormous gape and the ability to accommodate very large prey items.